s3-bucket-policy

Name: s3-bucket-policy
Availability: InStock
Author: dengineproblem

Create and analyze AWS S3 bucket policies for access control.

Updated Aug 27, 2026

Search Tags:#security #aws #access control #iam #s3 #bucket policy

Ready to run

npx skills add https://github.com/dengineproblem/agents-monorepo --skill s3-bucket-policy-dengineproblem

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: s3-bucket-policy
Source: https://github.com/dengineproblem/agents-monorepo/tree/main/.claude/skills/s3-bucket-policy
Command: npx skills add https://github.com/dengineproblem/agents-monorepo --skill s3-bucket-policy-dengineproblem

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill provides expert guidance on managing AWS S3 bucket policies, ensuring robust security, precise access control, and compliance with best practices.

Core Features & Use Cases

Policy Creation & Analysis: Generate and review IAM policies for S3 buckets.
Access Control: Configure permissions for cross-account access, public access, and specific IP ranges.
Security Best Practices: Implement encryption, versioning, and logging to protect your data.
Use Case: Securely grant read-only access to a specific S3 bucket for a partner account while blocking all public access and enforcing encryption.

Quick Start

Use the s3-bucket-policy skill to create a policy that allows read-only access to the 'my-data-bucket' bucket for the AWS account '111122223333'.

Frequently Asked Questions about s3-bucket-policy

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I create an S3 bucket policy for cross-account access?▼

To create an S3 bucket policy for cross-account access, you define an IAM policy that explicitly grants permissions to a target AWS account ID. This securely allows external accounts to access your specified S3 bucket resources.

Why does my S3 bucket policy throw an AccessDenied error?▼

An S3 bucket policy throws an AccessDenied error when IAM permissions conflict with bucket restrictions or lack explicit resource access. Analyzing the policy statements helps identify and resolve conflicting permission blocks.

What is the best way to enforce encryption using S3 bucket policies?▼

The best way to enforce encryption using S3 bucket policies is to implement a deny statement that rejects requests missing secure transport headers. This security best practice ensures all stored data remains encrypted.

How do I restrict S3 bucket access to specific IP ranges?▼

To restrict S3 bucket access to specific IP ranges, you configure a bucket policy with an explicit deny statement conditioned on the aws:SourceIp element. This blocks all traffic outside your approved network ranges.

What should I do when I hit S3 bucket policy size limits?▼

When hitting S3 bucket policy size limits, you must optimize your existing IAM policies by consolidating redundant statements and using wildcard resources. This reduces the overall policy footprint while maintaining access control.

Can I securely grant read-only S3 bucket access to a partner account?▼

Yes, you can securely grant read-only S3 bucket access to a partner account by creating a policy that restricts actions to s3:GetObject. This ensures the partner can retrieve data without modifying your bucket.